Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ee317f45310bc7b…

MALICIOUS

PDF

78.2 KB Created: 2021-05-06 23:00:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ddde277bdc2cb090e67976d5efd9a713 SHA-1: d0f6878d449d46caab9c7c33b0e8c85adf2c9580 SHA-256: 9ee317f45310bc7bd0bab3778f44a45f8eb2ab3e1e669d63b073b44859d449fd
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous embedded URLs, many pointing to disposable domains and link farms, suggesting a phishing or malware distribution campaign. The presence of external URIs and the 'link farm' heuristic indicate an attempt to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://botokaw.ru/strik?utm_term=youth+sports+wilmington+nc
    • http://carinsusa.info/spectrum_math_workbook_grade_8_free92cvz.pdf
    • http://bostpolamos.site/clinical_pharmacology_and_therapeutics_journal_abbreviationurutw.pdf
    • http://ita-bio.space/legacy_of_heorot_series6tpsa.pdf
    • http://francobusiness.com/venezibupemibogoznu6u3.pdf
    • https://cdn.sqhk.co/ranetixeba/QihIghh/hello_neighbor_act_3_xbox_one_guide.pdf
    • http://yourcy.com/maytag_neptune_dryer_cabinet_belt_replacementw35pg.pdf
    • http://netewe8.xyz/424737063238zkeo.pdf
    • https://cdn-cms.f-static.net/uploads/4371799/normal_604fd63cb53fc.pdf
    • https://cdn.sqhk.co/jipogidara/b4Yi1it/dreamers_book_lesson_plan.pdf
    • http://womenalikumat.22web.org/flyer_template_size_photoshop.pdf
    • http://4gusevshop.space/6324853822qqiuy.pdf
    • http://center-san.ru/tifuguxuufy4r.pdf
    • https://cdn.sqhk.co/zadorari/bigFjeS/93088171584.pdf
    • https://cdn-cms.f-static.net/uploads/4376103/normal_606aa07f1fdcc.pdf
    • https://cdn.sqhk.co/xeloxilava/aggiiOq/xexutujodajilog.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://zutotakome.epizy.com/how_to_learn_photoshop_cc_step_by_step_free.pdf
    • http://budobilososuw.rf.gd/vshare_helper_for_windows_7.pdf
    • https://s3.amazonaws.com/sorogamat/13601433842.pdf
    • http://fokodema.epizy.com/vigafovul.pdf
    • https://s3.amazonaws.com/liwafo/etv_circuit_thermo_king_code_89.pdf
    • https://s3.amazonaws.com/wanasuvedigo/building_estimation_and_costing.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1e2.bin
0ab01211eec72d640a545c0a21dbe92a784e6ab8cc429a8fa37e31137dec643c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF1E2 5188 bytes
font_01_sfnt_off0001037a.bin
cdc1d393b90f1d0666193d76f921e5ffb415a296ccf8cc9ba2fe6c6487cf518c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1037A 11476 bytes

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